Level 80 DPS?

Hey there,

i'm not that much into twinking but after i found the video of a fire Mage soloing most of Ulduar i got curious - i don't like Mages so i just wanted to ask, is it possible for Warlocks to dish out THAT much DPS at 80 aswell?

The ilvl would be ~335 at level 80. Already have everything i'd just like to know whether it should be a Warlock or a Mage.

As i said in the beginning, i'm not that much into twinking so that would probably be my one and only twink. I don't want to "waste" time on an alt and give him gear i bought from the auction house just to find out that it's bad.